The significance of the control cable shield layer
Release time:
2023-05-23 14:26
Highly flexible control cables are generally composed of conductors, insulation layers, outer belts and outer sheaths. The function of the insulation layer is to prevent leakage accidents and ensure the safety of electricity use; The function of the outer sheath layer is to reduce the damage and erosion caused by the external environment to the wire and cable; The inner cladding is mainly to protect the conductor.
However, inside the control cable, there will be a special protective layer, which we generally call a shielding layer. The main reasons for the existence of this shield are:
1, the meaning of the shield is that the electrons in the electric field end on the surface of the shield and are introduced to the ground, so as to achieve the role of separating the electric field, the shield layer protects the internal cable core of the shield from the interference of the external strong electric field, which is of great significance for the control cable, communication cable, computer and instrument cable.
2, we all know that the current flow will produce a magnetic field, the greater the current, the stronger the magnetic field, in order to prevent the magnetic field from affecting the surrounding equipment or equipment, so the shielding layer is increased to ensure that the magnetic field will not affect the operation of external equipment, reduce unnecessary trouble.
3, the shielding layer can also play a certain role in leakage protection. If the cable is damaged during use and leakage occurs, the shielding layer is grounded so that the current can be led to the ground wire, which has a certain protective effect. At the same time, it also has the role of protecting the cable conductor.
More special is that the current flowing during the use of the control cable is generally not very large, and the effect of the shielding layer can also reduce external signal interference. The main function of this shielding layer of the control cable is to shield the external influence of the control cable. Because the control cable transmits signals, which are affected by the outside world and fluctuate greatly, a shielding protective layer is added, which in turn protects the interior of the control cable. This is the biggest role of the control cable shield.
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